Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac5f6b758e69052…

MALICIOUS

PDF

52.5 KB Created: 2020-08-22 13:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfddd4816f45b2ac70348540645a5de3 SHA-1: 71d230ac440f9b125af3824f118de334c67f4c6a SHA-256: 6ac5f6b758e6905219277549b8839683780a83b55f2b8efbcc6e3677432cbc6b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link farm and a direct link to malicious redirector infrastructure, disguised as an airline ticket template. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates the primary URL leads to known malicious activity. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and URLs, suggesting an attempt to disguise its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=airline+ticket+template+pdf
    • http://files.evepinsonnault.com/uploads/1/3/1/3/131383318/7c55face7ae4.pdf
    • http://files.tedgoodden.net/uploads/1/3/1/6/131606762/kofewij.pdf
    • http://files.plymouthalliance.org/uploads/1/3/1/4/131437249/d9c12fa3b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/86228542614.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87913440599.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/94913907016.pdf
    • https://cdn.shopify.com/s/files/1/0443/8104/4902/files/apomixis_en_plantas.pdf
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/74156064234.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/93455689089.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/zuwovoxur.pdf
    • https://cdn.shopify.com/s/files/1/0434/0085/5706/files/xibedazotuzemoxezeku.pdf
    • https://cdn.shopify.com/s/files/1/0440/1987/5998/files/33782944832.pdf
    • https://cdn.shopify.com/s/files/1/0431/9513/8208/files/92436188942.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/83656598356.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008dd9.bin
0160d56a8152ce258a29fb90ab6571a484233d0e82f8f6ccf9b47902eea0df83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD9 5176 bytes
font_01_sfnt_off00009f55.bin
4645e9503eb06063b374aa80f967633a793de3924848dc7c295fd416eee77dc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F55 11064 bytes

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